Greatest Common Factor of 21, 43, 87, 111

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

• Greatest Common Factor of 21, 43, 87, 111 by common division method
• Greatest Common Factor of 21, 43, 87, 111 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 43

List of positive integer factors of 43 that divides 43 without a remainder.

1,43

Factors of 87

List of positive integer factors of 87 that divides 87 without a remainder.

1,3,29,87

Factors of 111

List of positive integer factors of 111 that divides 111 without a remainder.

1,3,37,111

Greatest Common Factor

We found the factors 21,43,87,111 . The biggest common factor number is the GCF number.
So the greatest common factor 21,43,87,111 is 1.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 13, 25, 75, 672
• GCF of 56, 65, 97, 338
• GCF of 88, 37, 83, 781
• GCF of 63, 48, 48, 607
• GCF of 16, 31, 90, 530

1. What is the GCF of 21, 43, 87, 111?

Answer: GCF of 21, 43, 87, 111 is 1.

2. How to Find the GCF of 21, 43, 87, 111

Answer: Greatest Common Factor(GCF) of 21, 43, 87, 111 = 1

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(21, 43, 87, 111) = 1.